the only time my wife watched porn was on VHS tapes, back in the 80's. her gf down the street got some tapes. I think my wife was curious as to where I fit in the spectrum of penis size. This was also after she discovered that during her last pregnancy, I had engaged in PE and my cock went from big to bigger. anyway, once maybe twice a week, she would visit her gf. she told me more than once that I was bigger than most of the guys on tape. I just went along cuz I was on the receiving end of cock admiration, receiving frequent and long blow jobs. one night, she brought the tapes home, and the next nite we watched it and she's sucking my cock the whole time, comparing me to guys on the tape. she concluded that I had a very big cock, porn worthy.
it got to be that when she came home from her gf's around 2 am. she woke me with a BJ, got me rock hard, rode me to orgasm. thankful/loving/glad/grateful, and fall asleep. start to finish was about 5 minutes. I knew if she went to her gfs, what was gonna happen when she came home.